I had a similar experience last cycle. It was my first time injecting in my quads and I would say my first 2 injections in each quad left me unable to walk. I mean limbing around at work lol. I have heard of some guys not having any issues at all and others having similar reactions to what you had.

And another thing, I would agree with the guys who said you may have gone a little too high. Personally for me, although that area has a more mass, it also is squishy so more water and fat pockets. I would say go a tad bit lower where you feel more dense muscle and that should make it a bit less painful!